ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,602, issued on April 22, was assigned to Canon K.K. (Tokyo).
"Liquid ejection head and liquid ejection apparatus" was invented by Kenji Yabe (Kanagawa, Japan), Naozumi Nabeshima (Tokyo), Soji Kondo (Kanagawa, Japan) and Koichi Kubo (Kanagawa, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A liquid ejection head for ejecting a liquid while being scanned in a main scanning direction includes a circulation pump capable of supplying the liquid from a supply channel into a pressure chamber, and collecting the liquid in the pressure chamber through a collection channel and sending the liquid to the supply channel; a first pressure adjustment unit dis...